I want to get up to about .95 latteral Gs. Or close enough to it. Should I get some Intrax springs or stock. If stock, which model/year? I want to can't spend too much $$$, so I'd perfer stock. ------------------ '82 Firebird, dead stock, 9 bolt disc rear, over 200,000 miles and still going strong, more to come... http://www.spinfrenzy.com/stingerssx...easures.html#4

Spring data was compiled by some members of the f-body.org mailing list a while back, the table is listed below. Higher load rate = stiffer spring. Some of the part#s have been discontinued so buying them new won't work. I've had good luck shopping at the junkyard looking at the 3-character "code" tag.

Bear in mind tires have same or more to do w/ g-pulling capacity than springs.

Front Springs
______________________________________________________________________
67 RS w/F41 Suspension
87 Z8 w/ FE2 Suspension

Prod# Code Service #
- - ---------------------------------------------------- (+) Highest load
rate
14029399 BZY 14029399 |
14029398 BZX 14029398 |
14029397 BZW 14029398* |
14029396 CDB 14029396 |
14029395 BXY 14029396* |
14029396 BXX 14029396* (-) Lowest load rate


Rear Springs
______________________________________________________________________
67 RS w/F41 susp
87 Z28 w/FE2 susp

Prod# Code Service #
- - ----------------------------------------------------(+) Highest load
rate
10018083 NNB 10018092* |
10018092 NNM 10018092 |
10018091 NNL 10018091 |
10018093 NNN 10018091 |
10032969 NYB 10018091 (-) Lowest load rate

-Kevin

------------------
1982 Z-28

See http://www.mycar.net/mafb/registry/detail.cfm?id=276 for details